We have an enterprise AIR app that fails during installation on some Windows clients

The file size is almost 1 gb, but it works perfectly on Macs and iPads, so can that really be the problem? Here is, what the log says:

[2012-06-07:09:49:14] Runtime Installer begin with version 3.2.0.2070 on Windows XP x86

[2012-06-07:09:49:14] Commandline is:

[2012-06-07:09:49:14] No installed runtime detected

[2012-06-07:09:49:34] Starting runtime install. Installing runtime version 3.2.0.2070

[2012-06-07:09:49:34] Installing msi at c:\docume~1\str_sna\locals~1\temp\aire.tmp\setup.msi with guid {47FA2C44-D148-4DBC-AF60-B91934AA4842}

[2012-06-07:09:49:51] Launching subprocess with commandline c:\Program Files\Common Files\Adobe AIR\Versions\1.0\Resources\Adobe AIR Updater -installupdatecheck

[2012-06-07:09:49:51] Runtime Installer end with exit code 0

[2012-06-07:09:49:53] Runtime Installer begin with version 3.2.0.2070 on Windows XP x86

[2012-06-07:09:49:53] Commandline is: -installupdatecheck

[2012-06-07:09:49:53] Installed runtime (3.2.0.2070) located at c:\Program Files\Common Files\Adobe AIR

[2012-06-07:09:49:54] Performing pingback request

[2012-06-07:09:49:54] Pingback request completed with HTTP status 200

[2012-06-07:09:49:54] Starting runtime background update check

[2012-06-07:09:49:54] Begin Background update download from http://airdownload.adobe.com/air/3/background/windows5.1/x86/patch/3.2.0.2070/update

[2012-06-07:09:49:54] Unpackaging http://airdownload.adobe.com/air/3/background/windows5.1/x86/patch/3.2.0.2070/update to C:\Documents and Settings\str_sna\Application Data\Adobe\AIR\Updater\Background

[2012-06-07:09:49:55] Runtime update not available

[2012-06-07:09:49:55] Unpackaging cancelled

[2012-06-07:09:49:55] Runtime Installer end with exit code 0

[2012-06-07:09:50:39] Application Installer begin with version 3.2.0.2070 on Windows XP x86

[2012-06-07:09:50:39] Commandline is: D:\usabraending\ecapsUS.air

[2012-06-07:09:50:39] Installed runtime (3.2.0.2070) located at c:\Program Files\Common Files\Adobe AIR

[2012-06-07:09:50:40] Unpackaging file:///D:/usabraending/ecapsUS.air to C:\Documents and Settings\str_sna\Local Settings\Temp\fla13.tmp

[2012-06-07:09:53:49] Application signature verified

[2012-06-07:09:53:49] Unpackaging/validation complete

[2012-06-07:09:53:49] No app located for appID 'com.oticon.ecaps.eCaps' and pubID ''

[2012-06-07:09:54:13] Converting unpackaged application to a native installation package in C:\Documents and Settings\str_sna\Local Settings\Temp\fla14.tmp

[2012-06-07:09:56:07] Native installation package creation failed: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="Unhandled exception Error: Error #3003" errorID=3003]

Does the last line in the log ring a bell to anyone? Any help here is very much appreciated as we are in the middle of a global role out.

Cheers,

Jesper